heat tests : add test for new manager show_watch_metric method
heat tests : add test for new manager show_watch_metric method

Add unit tests for new manager show_watch_metric action

Change-Id: Ie1b7c0a0e1eb5c7e5fad74674b1a9669bf7c9a1c
Signed-off-by: Steven Hardy <4d1810d1ff6d7f22d774341c4549c02173d2f2ab@redhat.com>

miguelgrinberg/heat,Triv90/Heat,steveb/heat,takeshineshiro/heat,Triv90/Heat,dragorosson/heat,rdo-management/heat,NeCTAR-RC/heat,redhat-openstack/heat,rh-s/heat,maestro-hybrid-cloud/heat,maestro-hybrid-cloud/heat,gonzolino/heat,pshchelo/heat,dims/heat,miguelgrinberg/heat,rdo-management/heat,dragorosson/heat,pshchelo/heat,citrix-openstack-build/heat,rickerc/heat_audit,ntt-sic/heat,redhat-openstack/heat,dims/heat,pratikmallya/heat,srznew/heat,steveb/heat,Triv90/Heat,rh-s/heat,JioCloud/heat,ntt-sic/heat,varunarya10/heat,pratikmallya/heat,gonzolino/heat,cryptickp/heat,cwolferh/heat-scratch,noironetworks/heat,varunarya10/heat,JioCloud/heat,cryptickp/heat,cwolferh/heat-scratch,citrix-openstack-build/heat,jasondunsmore/heat,jasondunsmore/heat,rickerc/heat_audit,NeCTAR-RC/heat,openstack/heat,srznew/heat,takeshineshiro/heat,noironetworks/heat,openstack/heat